Physics - Vectors Question with Solution | TestHub

Consider the two vectors : $\vec{A}=2\hat{i}+2\hat{j}+2\hat{k}$ and $\vec{B}=\hat{i}+\hat{j}+2\hat{k}$. Find the value of the scalar $\theta$ such that the vector $\vec{A}-\theta \vec{B}$ is perpendicular to $\vec{A}$.